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CN-122017278-A - Intelligent accurate measurement system for flow velocity of high flood large section

CN122017278ACN 122017278 ACN122017278 ACN 122017278ACN-122017278-A

Abstract

The invention discloses an intelligent precise measurement system for high-flood large-section flow velocity, and relates to the technical field of hydrologic measurement and radar remote sensing. The intelligent high-flood large-section flow velocity accurate measurement system is arranged in a shore-based non-contact mode, and the core comprises a comprehensive radar chassis, a scanning turntable, a receiving and transmitting antenna, a power supply system and a matched software unit. The measuring system realizes full coverage detection of the large-section river channel by scanning the one-dimensional turntable and matching with the azimuth narrow beam antenna, and a full-flow intelligent signal processing link and a river channel normal automatic identification algorithm are built in the measuring system, so that real-time inversion of the river water surface flow field, the section flow velocity and the flow can be accurately completed. The invention can continuously and automatically operate in all weather, has high measurement precision and strong environmental adaptability, and is suitable for hydrologic monitoring of high flood sections and early warning of extreme flood disasters.

Inventors

  • ZENG ZHONGYI
  • YIN GUANG
  • LIN SIXIA

Assignees

  • 南京微麦科斯电子科技有限责任公司

Dates

Publication Date
20260512
Application Date
20260326

Claims (9)

  1. 1. The intelligent high-flood large-section flow velocity accurate measurement system is characterized by comprising a comprehensive radar chassis, a scanning turntable, a transceiver antenna, a power supply system and a matched processing software unit, wherein the comprehensive radar chassis is respectively and electrically connected with the scanning turntable, the transceiver antenna and the power supply system, and the matched processing software unit is in communication connection with the comprehensive radar chassis or embedded and integrated in the comprehensive radar chassis; The receiving and transmitting antenna is fixedly arranged on an antenna mounting structure of the scanning turntable, can complete continuous scanning in azimuth along with the scanning turntable, and is used for receiving directional radiation of radar detection signals and echo signals on the river water surface; The comprehensive radar chassis is internally provided with a microwave unit, an intermediate frequency signal processing unit, a data processing unit, a system control unit and a data communication terminal, and is used for completing parameter control and generation of a transmitting signal, intermediate frequency processing and digital calculation of an echo signal, inversion of section flow velocity and flow data, scheduling control of a whole working flow of the system and bidirectional transmission of monitoring data and control instructions; the power supply system is used for providing an adaptive working power supply for each electronic module and electromechanical component in the system, so that the continuous and stable operation of the system is ensured; the matched processing software unit is used for realizing configuration of system working parameters, real-time monitoring of equipment working states, processing operation of radar echo signals, calculation of river water surface flow field data, visual display of monitoring data and remote interaction.
  2. 2. The intelligent high-flood-section flow velocity accurate measurement system according to claim 1, wherein the receiving and transmitting antenna adopts a slit antenna, the slit antenna adopts a beam design of a pitching wide beam and a azimuth narrow beam, wherein the pitching wide beam is used for covering a vertical detection range corresponding to river channel water level change, and the azimuth narrow beam is used for improving azimuth detection resolution and antenna gain.
  3. 3. The intelligent high-flood-section flow rate accurate measurement system according to claim 1, wherein the scanning turntable is a one-dimensional azimuth mechanical scanning turntable, and is provided with an azimuth driving mechanism and an angle feedback module, so that the transceiver antenna can be driven to complete continuous scanning within a preset azimuth scanning range at a set scanning speed, and full coverage detection of a water surface flow field within a river observation field angle range is realized.
  4. 4. The intelligent high-flood-section flow rate accurate measurement system according to claim 1, wherein the system control unit adopts an embedded industrial control computer as a hardware core, and is provided with special embedded control software for realizing forwarding of emission signal control parameters, issuing of a scanning turntable control instruction, time sequence scheduling of a system observation flow, and real-time acquisition and fault monitoring of equipment working states.
  5. 5. The intelligent high-flood section flow velocity accurate measurement system according to claim 1, wherein the intermediate frequency signal processing unit is provided with a multi-core vector operation processor, and is used for completing low-noise amplification, out-of-band interference filtering, frequency mixing down-conversion, AD digital sampling, pulse matching filtering processing and adaptive anti-interference processing of a distance Doppler two-dimensional signal, and realizing extraction of effective echo signals and suppression of noise interference.
  6. 6. The intelligent high-flood section flow rate accurate measurement system according to claim 1, wherein the data processing unit is provided with a high-performance processor supporting a vector floating point calculation instruction set and is used for completing Doppler feature extraction, abnormal data rejection, multi-angle echo data fusion, river channel normal direction identification, section sectional flow rate inversion and composite calculation of river real-time flow.
  7. 7. The intelligent high-flood section flow rate accurate measurement system according to claim 6, wherein a functional algorithm module is arranged in the data processing unit, and the functional algorithm module comprises an objective function construction module based on a Gaussian spectrum model, a Doppler feature extraction module based on a WSO algorithm, an abnormal data rejection module based on a fuzzy clustering algorithm, a river channel normal fitting module based on a least square method and a flow synthesis module based on an area equivalent integration method.
  8. 8. The intelligent high-flood-section flow rate accurate measurement system according to claim 1, wherein the data communication terminal is integrated with a wired communication module and a wireless communication module, and is used for realizing bidirectional data interaction between the system and a local control terminal and between the system and a remote data service platform and completing the receiving of remote control instructions and the real-time uploading of flow rate, flow quantity and flow field monitoring data.
  9. 9. The intelligent high-flood-section flow rate accurate measurement system according to claim 1, wherein the power supply system comprises a power supply inversion module and a battery power supply unit, and can convert external commercial power or direct current power supply into direct current working voltage required by each stage of modules in the system, and simultaneously supports offline battery power supply, so that continuous operation of the system in a power-off scene is ensured.

Description

Intelligent accurate measurement system for flow velocity of high flood large section Technical Field The invention relates to the technical field of hydrologic measurement and radar remote sensing, in particular to an intelligent accurate measurement system for high-flood large-section flow velocity. Background The real-time flow of rivers is the most important data in hydrology, water resource management and hydraulic engineering, and is an important content in intelligent hydrology construction. In order to accelerate the improvement of the modernization level of the natural disaster prevention and control technical equipment, the industrial and informatization organization implements 2025-year engineering attack special project of the natural disaster prevention and control technical equipment, and key technical equipment bottlenecks under extreme disaster scenes are emphasized to break through. According to the attack task of the "development action plan of the important field of safety emergency equipment" in the flood disaster prevention and control field, the "development of high-precision, long-distance and large-range flood disaster monitoring and early warning technical equipment" is explicitly proposed, and the "flow speed and water level real-time accurate monitoring technology under complex hydrologic conditions" and the "multi-parameter collaborative sensing and quick response equipment under extreme flood scenes" are mainly broken through. The method aims at the prevention and treatment of extreme flood disasters of small and medium rivers, and the file particularly emphasizes that the detection distance, the measurement precision and the environmental adaptability of the telemetering and alarming equipment are required to be improved so as to solve the problems of insufficient measuring range, data lag and the like of the current equipment in an oversized flood scene. Traditional hydrologic, limited by climate, measurement means and safety, response time, etc., flow test has been a difficulty in current hydrologic measurement. The traditional contact type flow measurement scheme has the defects that the flow speed of the river channel in Gao Hong period is high, the sand content is high, the floating sundries are more, the instruments are easy to damage and threat the personal safety, the water flow in dead water period is small, the water depth of part of the river channel is small, the ship navigation is usually carried on the water transport channel, the channels are required to be blocked for traditional test and measurement, the effects are generated, a cableway cannot be generally erected on the boundary river, and the flow test and measurement difficulty is higher. Conventional contact flow measurement schemes often fail to develop arrangements or do not perform properly. Flow test methods based on water level-flow curves have played an important role in the past, but since the water level-flow curves mostly lack flow data at high water levels, it is difficult to obtain satisfactory flow accuracy in this way, and high water level flow data is often the most interesting. At present, three methods, namely a manual flow measurement method, fixed-point contact measurement and an ultrasonic Doppler flowmeter, are mainly used in river monitoring in China. The current measuring methods are contact current measuring methods, and river measurement needs to be completed by using ship measuring equipment, cableway current measuring equipment and the like. Although new technologies such as unmanned aerial vehicle flow measurement exist at present, conventional service use cannot be performed. Under the condition of severe environment, especially when river closure, flood season (large flood), dike breach and earthquake natural disasters come, the conventional contact methods such as ship measurement, cableway flow measurement equipment and marine flow measurement equipment cannot be used for measuring the flow rate and the flow rate, and the conventional hydrological test cannot be used for automatically measuring the flood flow level under the high flow rate. In addition, the contact method is difficult to realize flow measurement in high-turbidity water areas and extremely shallow water areas. Radar measurement is used as a remote sensing technology, is widely applied to river flow rate measurement in recent years, and can solve the flow monitoring under special conditions such as severe weather, high water level, complex water body, emergency measurement and the like. The electric wave flow rate meter adopting the point flow rate measurement mode has high requirement on the installation position, and is installed above the water surface by means of a bridge or a cantilever bracket. Disclosure of Invention The invention aims to provide an intelligent accurate measurement system for high-flood large-section flow velocity, which is used for realizing non-contact, all-weather, continuous and auto